Slick Side A1 5.56 NATO Assembled Upper Reciever Black
$202.05 at Brownells · 4 stores
In stock
M4E1 Enhanced 5.56mm Assembled Upper Receiver For AR-15 BLK
Aero Precision · Upper Receiver
No ratings yetBest price
$168.99at Brownells
Out of stock checked Oct 21, 2026
In stock now instead
- Slick Side A1 5.56 NATO Assembled Upper Reciever Black $202.05at Brownells
- M16 A1 5.56 NATO Assembled Upper Receiver Black $206.75at OpticsPlanet
- TRYBE Defense AR-15 5.56x45mm NATO 16in Complete Upper Receiver… $257.47at OpticsPlanet
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells Best price | $168.99checked Oct 21, 2026 | Out of stock | Buy at Brownells | |
| Kentucky Gun Co | $184.99checked Oct 21, 2026 | Out of stock | Buy at Kentucky Gun Co | |
| OpticsPlanet | $199.99Salechecked Oct 21, 2026 | Out of stock | Buy at OpticsPlanet | |
| MidwayUSA | $199.99checked Oct 21, 2026 | Out of stock | Buy at MidwayUSA |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
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This part is out of stock at every store we track. These similar upper receivers are in stock, with today's prices.
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Price history
Dashed line = out of stock. Tracking since Sep 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Brownells | $168.99 | $168.99 | $168.99 |
| Kentucky Gun Co | $184.99 | $184.99 | $184.99 |
| MidwayUSA | $199.99 | $199.99 | $199.99 |
| OpticsPlanet | $199.99 | $199.99 | $199.99 |
Since Sep 28, 2026.
About this part
The M4E1 Enhanced 5.56mm Assembled Upper Receiver For AR-15 BLK is an AR-15 complete upper receiver from Aero Precision. It's sold by 4 stores, from $168.99 to $199.99.
Fits and works with
- Caliber
- 5.56 / .223 · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
Specifications
- Manufacturer
- Aero Precision
- Color
- Black
- Type
- Complete
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
From the manufacturer
Aero Precision's state of the art M4E1 platform starts here, with the M4E1 Upper Receiver. The M4E1 upper receiver is a one-piece design combining the handguard mounting platform with the upper itself. Through superior engineering, Aero have condensed the parts needed to mount a free-floated handguard to a mere 8 screws. Since the handguard mounting surface and upper are of the same forging, not only is it a stronger system, but they are able to make additional lightening cuts to save weight and allow for more efficient cooling. Ease of installation - Simply insert your barrel assembly into the M4E1 upper, tighten it using the provided barrel nut and wrench, slide you Mfg: Aero Precision SPECS: Material: Forged 7075 T6 Aluminum with hard coat anodized finish.
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